The car is running good.

Look at the difference in 1/8 and 1/4 mile trap speeds. Not much for you to do in the second 660 feet. All your work is in the first 660 feet.

 

Good point. Here is a stock HR slip from me, these are almost identical:
60' - 2.282
330 - 5.959
1/8 - 8.997
mph - 81.41
1000 - 11.562
1/4 - 13.747
mph - 102.24

In fact, my 60' and trap were worse and I still beat him. Makes me wonder...

EDIT: He clearly lost in the beginning from driving, but 300 whp should be trapping higher than that and would have gained more than a couple hundredths in the end. I think he needs to have his car put on a dyno at another place.

 

yeap it looks the same. I have dyno'd my car twice already. Same dyno same tech guy. I dont know what's going on.

 

Is this the same Tadashi guy from Technosquare that everyone keeps talking about? Hmmm...

 

No, i am actually on the other end of US (Seattle). However, i have their reflash.

 

I would have the car dynoed again somewhere else. Chances are you're not making any more power than stock.
Is your track at sea level? Do you know? What was the weather like when you ran?
These are all factors that could affect your times; the colder and dryer the air is, the better your car will run. And the closest you are to sea level, the better your car will run.

 

Comparing those slips, your 60' is worse but you still beat him to the 1/8 mile. But from the 1/8 mile his car seems faster; 22mph gain for him vs 21mph gain for you, and his ET is slightly better than yours too after the 1/8; 4.71 sec vs 4.75 sec
He probably got off the line better than you for the first 60', but you probably had better gear shifts to second and third, which would explain why you were ahead at the 1/8.

Of course that's assuming conditions were nearly identicar when you both ran, which is usually unlikely. In reality it's rather pointless to compare timeslips of two different days and on two different tracks.

 

i have an old dyno chart with exhaust, intakes, test pipes, and reflash st 78 degrees(outside temp) and 89% humidity at a 700 feet elevation. It was pouring like crazy that day too. We also used a small teeny fan. It was hot in the shop quickly. I dont know if you call this close to stock?!?
***Disclaimer: this is an old dyno*****

 

^^also this is NOT a chart where i revved it to 8000rpms.
The new numbers are 302whp/274.6wtq. I will try to retrieve the chart from the shop i went to.
Btw, this is after a UR pulley(which didn't do much), and exhaust leak being fixed.
It was on a 56 degree nice day with three snail looking fans and low humidity.
I also have different wheels now.The first dyno was with 31lb wheels vs the 17 lb wheels i have now. However, i dont think that this matters much anyways.

 

I trapped 107mph with 262whp. YOU need practice, the car is fine.

edit-I also doubt your peaking at 8000rpm's. No need to shift there after the 1-2 shift. Revise your shift points and hit 4th

 

The power decreases after 7000rpms. Thats what i figured too, that i am the problem not the car. Thanks Alberto, i would take an advice from you anytime.

 

+1 I think practice will help you alot. The first few times I took my HR to the track I couldn't even hit 13s to save my life. Practice makes perfect. Also I can tell you from first hand experience that you will run slower shifting all the way at 8000.

What worked for me is to shift at 8000 in first gear only and the rest of the gears I shifted at about 7500. It netted me a 13.2 on a hot day and I definitely don't have 300 whp.

 

How the altitude, because that can slow your time also. I'm not sure how high Seatle is.

 

You need to look a bit closer. I was ahead by 330', not the 1/8, with him slowly catching up the rest of the run. You are preaching to the choir about DA. I know the DA for my time, and it was 70 degrees in Florida humidy that day. He is in Seattle, Washington so I'm very sure the DA was comparable if not better. Regardless, 300 whp is enough to see much better gains than that. It would take a huge DA difference to slow down a 300 whp car to run like a stock Z, and 1 mph difference between tracks means nothing. I can go to different tracks and have the trap vary by more than 2-3 mph for the same car due to the way mph is measured.

If you know so much, get yourself a time posted here:
https://my350z.com/forum/drag/233840...ons-stock.html

EDIT: This is this track in Seattle. Unless it was like 100 degrees that day, DA was not a factor here.

 

Maybe you need to look closer. Last time I checked 8.9sec is faster than 9.0. But what do I know...


I agree with most of what you're saying though, but you'd think with test pipes and all those other mods his car should be decidedly faster than yours. His timeslip compared to yours seems to indicate his car is about the same, but if you were to race heads up I think he'd beat you handily. He might not be quite at 300whp though, I got to admit.

Sorry if my opinion has hurt ur feelings.

 

Ok, I guess I need to draw you a diagram...

Him -------------- Me
R/T - .071
60' - 2.275 ---------2.282 -.007
330 - 6.032 --------5.959 +.073 <---I take the lead
1/8 - 9.061 --------8.997 +.064 <---He is gaining ground
mph - 82.09 -------81.41
1000 - 11.614 -----11.562 +.052 <---He's still gaining ground
1/4 - 13.78 --------13.747 +.033 <---He's still gaining ground
mph - 104.57 ------102.24

Where did my 2nd to 3rd shift pull me ahead in the 1/8th? I guess that happened during the first 330', right?

Don't get butt-hurt at me because you don't know what you are talking about and I corrected you.

EDIT: I take back the bogging part, it's possible he just spun more than me.

 

Try these shift points

1-2 @ 8000rpm's - 1st goes so fast it doesnt mater if you go past the peak, and when you land 2nd gear its higher in the powerband

2-3 @ 7200rpm's

3-4 @ 7000rpm's

I guarantee you next time on the same 60ft it will be a few tenths quicker. Dont fear shifting to 4th gear, just do it cleanly and it will be fine.

 

Will definitely try it. The entire time i was trying to make it through the 1/4 in 3rd gear. The problem the times i ran was that there were freaking hot rods next to me(noise level was way too high). Therefore, even if i were to bounce the limiter, i wouldn't even know. Thanks for the advice

 

If you guys have dyno sheets, find out where you're making max power and shift close to that rpm. No sense going to redline if you're not making power there.

 

OK I was wrong. I thought u were saying that he was faster than you at the 1/8, instead of BY the 1/8. Reading comprehension sometimes ownz me, what can I say.
My whole point still remains that you were faster at the start probably due to better shifting, but by the end, it seems he is overpowering you, even though your 1/4 mile ETs are almost identical.